Dimensional Hop is a spell like ability that travel clerics get at level 8. What would the concentration check DC be on that ability? Additionally how do you template that in a character block? I was hoping there would be an example of non-"per day" spell-like abilities, but I didn't see any. By templating in a character block, I mean, e.g.:
Cleric Spell-like Abilities
1/day -- great terror (DC 17), great sadness (DC 19)
Note: neither of those exist as far as I know.
Generally you figure out what spell the SLA is equivalent to, and treat it as being that level. In this case, a short-ranged teleport spell that you get at cleric 8 matches up with dimension door remarkably well, so you call it spell level 4 and calculate concentration checks accordingly.